Fastening device for windings of static electrical equipment



Jan. 17, 1967 M. VULLIERMET ,2 FASTENING DEVICE E03 WINDINGS OF STATICELECTRICAL EQUIPMENT Filed Aug. 21. 1963 FIG/1 /NV/V70R MARCH.VULL/ERMET United States Patent 6 Claims. (a. 336-197) This inventionrelates to transformers of the type which employ a core of magneticmaterial about which primary and secondary windings may be positioned ininductive relation to operate in a well-known manner and, moreparticularly, to such an apparatus which may be more convenientlyassembled.

It is well known to those acquainted with this art that when thewindings of a transformer are short-cirouited or heavy loads occur thuscreating severe mechanical stresses within the transformer, the coilsare caused to be separated in a direction normal to their faces and toovercome this various types of pressure-applying means have beenutilized to tightly clamp the coils together.

Various types of structure have been proposed for use in assemblingtransformers and to thereby apply suitable pressure to the secondary andprimary windings in order to maintain the transformer in its maximumworking condition. However, heretofore no one has proposed the improvedtype of transformer disclosed herein wherein the coils of which may beassembled at one location and then later moved to another position whereit may be placed over the laminated core.

Accordingly, the primary object of the invention is to provide anassembly providing a plurality of coils and a balancing means thereforwhich may be lowered over a perpendicularly disposed core.

Another object of the invention is to provide a pair of oscillatableperpendicularly disposed elements which extend upwardly from a supportmedia which is adapted to mount a base member relative to a pressureapplying means that is positioned above the coils.

A further object of the invention is to interpose adjusting meansbetween the pressure applying means and the upper flat surface of saidcoils.

Other objects and advantages will become apparent from the followingdescription taken in conjunction with the accompanying drawings, inwhich:

FIG. 1 is a partial side view of a transformer column with the magneticcore omitted, and

FIG. 2 is a top plan view of the transformer column showing thelaminated core.

Turning now to the drawings, and more particularly to FIG. 1, there isshown at 10 the outermost of the plurality of coils which are positionedon a base member 11 with each of the plurality of coils being providedat its upper flat surface with annular ring-type means 12 and 13 (seeFIG. 2) which are intended for a purpose that will become apparent asthe description progresses.

Beneath the base member 11, and adapted to support the same, are a pairof spaced elements 14 (only one of which is visible in FIG. 1, thesespaced elements being rigidly mounted relative to a platform or othertype of support by upwardly projecting spa-cedly-arranged bolts 15 and16.

With further reference to FIG. 1, it will be noted that thespacedly-arranged elements 14, previously mentioned, are provided withapertures 17 of suitable configuration and complemental to 'ball jointor other spherical-type means 18 which are secured to the terminal endportion of bars 19 (only one of which is shown) that extendsperpendicularly to the spaced element 14 and upwardly through the areadefining the space 20 'between the core 21 and the inner of said coilswhich is positioned beneath the annular ring-type member 13 that is bestshown in FIG. 2. Each of the perpendicularly-disposed bars 19 isprovided at its upper free end with spherical or other balltype jointmeans 18 and is complemental to an opening 22 provided in thehorizontally-disposed spacedly-arranged pressure-applying means 23 and24, this also being best shown in FIG. 2. Interposed between the lowersurface of the pressure-applying means 23 and 24 and the annularring-type means which are applied to the upper flat surfaces of each ofthe plurality of coils are positioned adjusting means as shown. Theadjusting means may comprise turn buckles or any other suitable means ofa similar type and these elements, as indicated at 25 and 26, may applyuniform pressure to the innermost ring positioned on the coil whichsurrounds the core 21 and the outermost adjusting means 27 and 28 areinterposed between the pressure-applying means 23 and 24 and the upperflat surface of the outer of said annular ring-type means which ispositioned on top of the second of said plurality of coils.

In view of the foregoing, it will be apparent to those skilled in theart that it is possible to assemble the plurality of coils in a column,together with their fastening means, and thereafter lower it onto thelaminated magnetic core, or in the alternative remove a column fromabout the core. Accordingly, with such an arrangement the-re is provideda unit which can be stored and manipulated so as to 'be mounted ordismounted from a magnetic circuit.

Although only one embodiment of the invention has been depicted anddescribed, it will be apparent that this embodiment is illustrative innature and that a number of modifications in the apparatus andvariations in its end use may be effected without departing from thespirit or scope of the invention as defined in the appended claims.

I claim:

1. A unitary structure including concentric coils which subsequent toassembly of its component parts is arranged to have its inner coilsurround a magnetic core to form a transformer, said structurecomprising a pair of chord members extending substantially to theperimeter of the outer of said concentric coils, a base member providedwith means defining a central perforation supported on said chordmembers and arranged to support said coils, a pair of ring means, oneeach of which is mounted on the coils, pressure applying meanspositioned above said coils and said ring means, a pair of bar meanshaving upper and lower end portions, the lower end portion of each ofthe bar means being pivotally attached to said chord members and theupper end portions being pivotally attached to said pressure applyingmeans, said pressure applying means exerting pressure on said ring meansand said coils.

2. A unitary structure as claimed in claim 1, wherein the upper andlower end portions of said 'bar means inelude means to permit cantingbetween the base member and the pressure applying means.

3. A unitary coil structure as claimed in claim 1, wherein said pressureapplying means are in substantial parallelisrn.

4. A unitary coil structure as claimed in claim 1, wherein said pressureapplying means include adjusting means, said last named means beinginterposed between said pressure applying means and said ring means.

5. A unitary structure as claimed in claim 1, wherein the upwardlyextending bar means are positioned in spaced parallel arrangement.

6. A unitary structure as claimed in claim 1, wherein the bar meansextending from the chord members to the 4 pressure applying means ispositioned inside the inner coil.

References Cited by the Examiner UNITED STATES PATENTS 180,614 12/1954Austria.

LARAMIE E. ASKIN, Primary Examiner;

D. J. BADER, T. I. KOZMA, Assistant Examiners.

1. A UNITARY STRUCTURE INCLUDING CONCENTRIC COILS WHICH SUBSEQUENT TOASSEMBLY OF ITS COMPONENT PARTS IS ARRANGED TO HAVE ITS INNER COILSURROUND A MAGNETIC CORE TO FORM A TRANSFORMER, SAID STRUCTURECOMPRISING A PAIR OF CHORD MEMBERS EXTENDING SUBSTANTIALLY TO THEPERIMETER OF THE OUTER OF SAID CONCENTRIC COILS, A BASE MEMBER PROVIDEDWITH MEANS DEFINING A CENTRAL PERFORATION SUPPORTED ON SAID CHORDMEMBERS AND ARRANGED TO SUPPORT SAID COILS, A PAIR OF RING MEANS, ONEEACH OF WHICH IS MOUNTED ON THE COILS, PRESSURE APPLYING MEANSPOSITIONED ABOVE SAID COILS AND SAID RING MEANS, A PAIR OF BAR MEANSHAVING UPPER AND LOWER END PORTIONS, THE LOWER END PORTION OF EACH OFTHE BAR MEANS BEING PIVOTALLY ATTACHED TO SAID CHORD MEMBERS AND THEUPPER END PORTIONS BEING PIVOTALLY ATTACHED TO SAID PRESSURE APPLYINGMEANS, SAID PRESSURE APPLYING MEANS EXERTING PRESSURE ON SAID RING MEANSAND SAID COILS.